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我使用pyalgotrade創建交易策略。我正在瀏覽代碼列表(testlist),並將它們添加到字典(list_large {})中,以及我正在使用get_score函數獲得的分數。我最近的問題是,字典中的每個ticker(list_large {})獲得相同的分數。任何想法爲什麼?功能返回相同的值爲不同的輸入
代碼:
from pyalgotrade import strategy
from pyalgotrade.tools import yahoofinance
import numpy as np
import pandas as pd
from collections import OrderedDict
from pyalgotrade.technical import ma
from talib import MA_Type
import talib
smaPeriod = 10
testlist = ['aapl','ddd','gg','z']
class MyStrategy(strategy.BacktestingStrategy):
def __init__(self, feed, instrument):
super(MyStrategy, self).__init__(feed, 1000)
self.__position = []
self.__instrument = instrument
self.setUseAdjustedValues(True)
self.__prices = feed[instrument].getPriceDataSeries()
self.__sma = ma.SMA(feed[instrument].getPriceDataSeries(), smaPeriod)
def get_score(self,slope):
MA_Score = self.__sma[-1] * slope
return MA_Score
def onBars(self, bars):
global bar
bar = bars[self.__instrument]
slope = 8
for instrument in bars.getInstruments():
list_large = {}
for tickers in testlist: #replace with real list when ready
list_large.update({tickers : self.get_score(slope)})
organized_list = OrderedDict(sorted(list_large.items(), key=lambda t: -t[1]))#organize the list from highest to lowest score
print list_large
def run_strategy(inst):
# Load the yahoo feed from the CSV file
feed = yahoofinance.build_feed([inst],2015,2016, ".") # feed = yahoofinance.build_feed([inst],2015,2016, ".")
# Evaluate the strategy with the feed.
myStrategy = MyStrategy(feed, inst)
myStrategy.run()
print "Final portfolio value: $%.2f" % myStrategy.getBroker().getEquity()
def main():
instruments = ['ddd','msft']
for inst in instruments:
run_strategy(inst)
if __name__ == '__main__':
main()
每次調用self.get_score時,它都不應該返回相同的值。該函數獲取self .__ sma [-1]並將其乘以斜率...如果每個ticker具有不同的移動平均值,那麼放入字典中的值不應該不同麼?我有點困惑... – RageAgainstheMachine
@RageAgainstheMachine:你對'self.__ sma [-1] * slope'的理解是什麼?它從'self .__ sma'中取出最後一個條目,並將其與'slope'相乘。每次都不一樣嗎? –
我的印象是,它需要最新的sma,但我認爲我已經編寫了代碼,以便使列表中每個單獨的代碼最新的sma。我將如何完成這項工作? – RageAgainstheMachine